You get what you pay for...CIA guns are hit and miss, a lot of time 'miss'. Send the gun back to CIA & it should be fixed or replaced.
I don't have experience with CIA semi's, a bolt action M1944 of mine had to go back for replacement. The second gun they sent is great. I wouldn't call them expensive junk, but a lot are medium-priced junk. check that headspace wasn't adjusted by grinding on the bolt.
-hanko